Brand Name: OEM Model Number: JF-B203 Style: Headband Communication: Wireless Connectors: Bluetooth color: red, blue, green, white, black, pink.. Packaging & Delivery Packaging Detail: 1PC/Polybag, 100pcs/ctn/:51*46*30.5cm G.W.: 13kgs N.W.: 12kgs Delivery Detail: 30 days after confirming order and sample Specifications 1.Stereo Bluetooth Headphone 2.Bluetooth vertion:v2.1+EDR class2 3.Work with mobilephone, laptop,new nano 4.Many color Stereo Bluetooth Headphone, Wireless Bluetooth Headphone for iPhone, mobilephone,new nano and table pc. * Stereo bluetooth headphone* Work with mobile phonesm new Nano, tablet pc* Bluetooth Specification v2.1+EDR class2* Talk / music time: up to 10 hours
Specifications bluetooth headset/headphone. with microphone. No wire,no software,no setup, it is easy and fast. High SNR Bluetooth audio. Bluetooth headset (headphone) 1:Bluetooth 2.1 wireless transmission protocol
Specifications The High Quality Bluetooth Headset for Iphone 1.Bluetooth stardand: V3.0 2. standby time: 60hrs 3.With BQB, FCC 4.Hot sale The High Quality Bluetooth Headset for Iphone*Working range: 10M*Talk time: 3 hrs*Standby time: 70 hrs*Charging time: less than 3 hrs*Battery: Rechargeable 60mAh Li-Polymer Battery*Charger Power: Input 100-240 V AC, Output: 5V DC Product configuration including
Specifications 1.stereo Bluetooth v3.0 2.Smart connection; 3.Rechargeable battery system; 4..Built-in Mic Sports MP3 Player with TF card slot -Headset Handsfree Headphones TF card support,bluetooth built-in, mp3, headphone, telephone, EQ Specification( bluetooth part) Bluetooth Headphone with TF card MP3 player1. stereo Bluetooth v3.02. with tf card mp3 player3. high quality stereo bass sound4. Built-in rechargeable Li-ion battery5. accessory: USB cable, audio cable Specification(mp3 part)Audio format support: MP3/WMA/WAVExternal memory enlarge: TF card( Max 8G)Play time: continue about 10 hoursUSB Jack: USB 2.0Frequency response: 20Hz~20kHzOutput power: 15mW*15mWRecord sampling rate: 64Kbps/8KHzRecord format: WAV Hardware specification definitionSolution Transmit powerClass 2, Max4 dBmReception sensitivity-88dbm(typical)Working Band2.4G ISM Band,2.402-2.480GHzModulation systemGFSK,π/
Specifications *fashion bluetooth headphone buletooth headset for iphone *color:black or white *for iphone,nokia,sony mobile phone SPECIFICATION: *iphone mini*cable line :10 (cm)distance :10M CALL time :4 hourscharging time :2-3hourscolor : blakc or white
Specifications Bluetooth Headphone Headset 1.Neckband design 2.Suitable for all bluetooth 3.Built-in Microphone 4.Sports Bluetooth Headphone Headset For Mobile Phone Model No.BTS-0501NSupporting EditionBluetooth version: V2.1+EDR Frequency Range2.4GHz - 2.48GHzBluetooth Protocol A2DP/AVRCP/HFP/HSPTransmission Distance About 10MTalking time of Headphone Headset ≥ 5 hoursStandby time of Headphone Headset More than 30 hours Environment Temp.Working-20 °c - 60°cCharging0 °c - 45°cStorage-20 °c - 60°cOperating Voltage4.2VOperating Current≤ 35mAStandby Current≤ 2mABattery Type (Built in)Polymer Lithium Cycle Life300 charging cyclesAdaptor Input110.0 - 220V / 50 - 60Hz / 125mA OutputDC 5.0V / ≤ 80mACharge Time (Duration to reach full)2 - 3hoursDimensions (L*W*H) of Headphone Headset 15*10*5.5cm(For gift box) Approx Weight of Headphone Headset 44g Bluetooth connecting peopleBuilt-in
Brand Name: TianXing Model Number: bth-086 Style: Headband Communication: Wireless Use: game player Function: Bluetooth Place of Origin: Guangdong China (Mainland) Products Status: Available Bluetooth versions: V2.1 Compatibility with V2.0 and V1.2 Transmission distance: 10M(class 2) Frequency: 2.4 GHz Weigth: 0.42KG Standby time: 220 hours Talk time: 13 hours Charge hours: 3 hours Power supply: DC 5.0V / 120Ma Working voltage: 3.3--4.2V Packaging & Delivery Packaging Detail: blister card Delivery Detail: 2-3 Days Specifications 1.Bluetooth Wireless Headphone For PS3 2.For PS3 bluetooth headset 3.Bluetooth versions V2.1 4.High Quality 5.OEM Bluetooth Wireless Headphone For PS3 Features:1). Multi-point supported: 2 connections simultaneously2). Support bluetooth headset,handfree profile3) .Redial the last call ,Reject call.4). Volume adjustable.5). LED indicates connection.6). Faster connecting, clear sound, anti-interference7). Over-the-head Design8). Noise cancelin
Specifications high quality wireless bluetooth headphone 1. ROHS 2.OEM services 3.stylish design 4.fast delivery Services / FAQs & Order Procedures Who ? We are factory do earphone more than 8 years in Dong guan city ,we have more than 300 workers ,this earphone is very hot sales in 2012,we have all series of this earphones and headsets ,they are all with good speakers ,so have good sound ,all with high quality so promise your good business in your city ,they are all with original packing so takes your good sales . What? Besides the this earphone, we also offer much&nbs
Specifications Multi-point technology bluetooth headset BH29 Bluetooth Echo and Noise Cancellation Headset Dual-Microphone New arrival Multi-point technology bluetooth headset headphone BH29 Feature :Dual-Microphone CVC V5.0, Echo and Noise Cancellation, Packet/bit Error Correction TechnologyBluetooth Specification V2.1+EDR class 2 Supports connecting to two phones simultaneously Rechargeable 80mAh Li-Polymer Battery Normal charging time: Max 1.5 hours Talk time: Up to 4.5 HoursStandby time: Up to 120 hours Specification * Bluetooth Specification v2.1+EDR class 2 * Multi-point technology, CSR BC6150 chip* HFP V1.5 and HSP v1.1 support* RF Frequency Range: 2.402-2.480GHZ, 2.4G ISM band* Radio Performance: Receive Sensitivity of -90dBm, TX Power Max 4dBm* Frequency Response: 20Hz- 20kHz, Very high Signal to Noise Ratio (SNR): 95Db,Total Harmonic Distortion(THD): 0.1%* 3 Buttons design: MFB, VOL+, VOL-* LED Indicator Status: Blue, Red* Rechargeable 80mAh Li-
Brand Name: MJ Music/Headphone bluetooth Model Number: MJ-368 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Portable Media Player Function: Bluetooth,Microphone Place of Origin: Guangdong China (Mainland) category: headphone bluetooth microphone: built-in microphone Selling Point: Headphones Bluetooth Wireless DJ TF card: Support 16GB TF Play With FM Radio Function: To Support Campus Radio comfortability: Comfortable wearing for long time 8 Sounds Available: To Cater Different Music Demand OLED Display Screen: To Enjoy Dynamic & Stereo Music battery: Built-in battery Full of power: Be Using 8 Hours Packaging & Delivery Packaging Detail: 61.5x43.5x35.5cm 60 pcs / ctn G.W: 14 KGS N.W: 12.9 KGS Delivery Detail: within 2 days if the headphones are in stock Specifications 2013 latest headphone bluetooth with mp3 Fm radio 1.fashion design 2.support IF/micro SD card 3.OLED display 4.Factory CE 2013 latest headphone bluetooth with mp3 Fm radio : Main features:1, Bluetooth
Specifications good quality, cheap, quick delivery time used for mobilephone&PS3 manufacturer offer Detailed Product Description1.Best selling mono wireless headset 2.Built-in rechargeable battery 3.Energy saving 4.Distinctly superior Features of Wireless headset: 1.Wireless headset with built-in rechargeable battery 2.Wireless headset,suitable for different bluetooth mobile phones 3.Wireless mono call center headset, low end and long talk time 4.Wireless headset with adjustable volume and 10 meters effective range 5.stylish mini and elegant appearance design 6.easy to wear without hook ,very comfortable 7.Redial the last call,clear sound,reject call,volume adjustable 8.Faster connecting ,convenient to listen to MP3 from cellphone 9.Talking time:up to 3H,Standby time:about 75H 10.CE,FCC,RoHS approval Product Specification: * Talk time: Up to 3 hours t
Specifications 1.Supports Bluetooth Headset and Handsfree Profile 2.Mini foldable design,great for travel and out door use 3.Remote function Feature: • Enjoy music wirelessly with Bluetooth stereo enabled device • Build-in high-quality 40mm mylar loudspeaker for audiophile grade sound quality. • Active noise suppression and echo cancellation for superior conversation sound quality • Convenient USB charging • Bluetooth™ specification ver.2.1 + EDR • Remote function : Play, Stop, previous/next,volume+/- • Hands-Free talking • Mini foldable design,great for travel and out door use • on-ear design and adjustable headband provide long-lasting comfort
Specifications stereo bluetooth headphone 1.Handsfree Headset,compatible with any phones 2.Removable ear-hook fits either ears 3.CE,ROhs stereo bluetooth headphone. Feartures: CE,ROHS,FCC approvalBluetooth Version 2.1+EDRNoise Cancelling Functiongood quality,superior clear voiceErgonomic and Fashion designRemovable ear-hook fits either earsBluetooth Handsfree Headset,compatible with any mobile phoneHigh Capacity&Rechargeable BatteryAutomatic cennecting functionEnergy saving function,200% longer talk timHandsfree,answer/reject call and call the last coming NO.Voice Dialing,Re-dialing function.Technical Parameter: Frequency range:2.4GHz-2.48GHzTransmission power:class2Transmission distance:10MOperating voltage:3.6VOperating current:≤35mAStandby current:≤2mACharger power:Input 100~240V AC,Output 5V DCWorking temperature:-20°C~60°CCharging temperature:0°C~45°CCharging time:2 hoursStandby time:120 hours
Specifications bluetooth headphone 1.earphone for mp3 ipod iphone 2.novelty earphone headphone 3.passed CE&Rohs,PAHs 4.flat cable blue 2013 Wireless stereo studio Headphone retractable Silent disco colorful with mic factory price very cheap About us: Shenzhen Dayixin Technology Co., Ltd, established in 2007, specialized in developing and manufacturing various types of headphones, earphones, mini speakers and Microphones. Our office is located in Songgang Town of Shenzhen with convenient transportation and fast market information, we provide high-quality and competitive price products. Our Main lines: wireless headphones, Bluetooth Headsets, Stereo Headphones, computer headphones, mp3 earphones, mobile earphones, retractable earphones, mini speakers, bag speakers and Microphones ect... Shenzhen Dayixin Technology Co., Ltd. consists of two economic entities approved by the government, which are Shenzhen Dayixi
Brand Name: KETONSIN Model Number: N95 Style: Ear Hook Communication: Wireless Connectors: 2.5mm Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) Version: Bluetooth V2.1/3.0+EDR Talking time: 3-4H Standby time: >=100H Effective distance: 10M Charging time: 2-3H DC: 5V Machine Dimensions: 16*32*9 mm Machine weight: 6.4g Packing Dimensions: 100*160*40 mm Full set weight: 67.0g Packaging & Delivery Packaging Detail: 1pcs/Gift box 100pcs/Carton Carton Dimensions:53*34*465mm N.W:9.0KGS G.W:11.0KGS Delivery Detail: Within 3 working days after received the full payment. Specifications 1. Version: Bluetooth V2.1/3.0+EDR 2. Talking time:3-4H 3. Standby time:aa100H 4. Effective distance:10M 5. DC:5V Specifications:1. Version: Bluetooth V2.1/3.0+EDR2. Talking time:3-4H3. Standby time:≥100H4. Effective distance:10M5. Charging time:2-3H6. DC:5V7. Machine Dimensions:16×32×9 mm8. Machine weight:6.4g9. Packing Dimensions:100×160×40 mm10.F
Specifications bluetooth headphone 1.Bluetooth stereo head set let you listen to music or phone calls wirelessly 2.High-quality speaks delive bluetooth headphone 1.Bluetooth stereo head set let you listen to music or phone calls wirelessly2.High-quality speaks deliver crisprich sound3.Accept incoming calls or toggle between tracks with the touch of a button4.Lightweight,comfortable design for all-day listening.5.Compatible with bluetooth enabled devices, such as IPHONE,IPAD,most computer,cellphones6.Frequency response:20-20,000Hz7.Speak Impedance:32 ohm8.Omni-directional high quality microphone9.Sensitivity microphone10.Transfer Distance:33FT/10M11.Frequency:2.4GHz12.Technology:Bluetooth V3.0+EDR13.Easily charge via USB port14.Play/Talk-10Hrs15.Low battery notification
Brand Name: Starfly Model Number: MBT02 Style: Ear Hook Communication: Wireless Connectors: Blueooth connection Use: Motorcycle, Bike, Ski, Wokers Helmet Function: Bluetooth Place of Origin: Guangdong China (Mainland) name: Intercom helmet Headset/ Bluetooth headset for universal Motorcycle DIstance: 500 meters Color: Black For motorcycle: YES For Bicycle: YES For workers: YES For sports: YES FM: YES Interphone: YES Factory service: YES Packaging & Delivery Packaging Detail: Colour Box+Blister Bag Color Box Size : 21x17x6 cm Carton Size: 65x34x23 cm/24 sets/Ctn G.W.: 21KG. Delivery Detail: 1-3 business days after bank transfer confirmation Specifications Sports!!Motorcycle Intercom helmet Headset/ Bluetooth headset for universal Motorcycle -Manufacturer 500m range HD voice Sports!!Motorcycle Intercom helmet Headset/ Bluetooth headset for universal Motorcycle -Manufacturer Motorcycle helmet headsets / intercom /bluetooth hands
Brand Name: MSphone Model Number: XSL-298 Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) Material: ABS Color: White,black,red,yellow,blue,pink Transmission Scope: 10 meters Packaging & Delivery Packaging Detail: Gift Box. Delivery Detail: 5 days Specifications 1.Support all bluetooth mobile phones. 2.Volume control,noise-reducing,anti-radiation. 3.CE/RoHS approved. 4.OEM service. Use the steps1. Turn on the power: When using Bluetooth, press the function key until the blue lights and flashes.2. Pairing:A. Press the Bluetooth device function key, when there is a long bright blue light when you can match;B. Activate the phone Bluetooth function;C. Open the Bluetooth search function;D. receive search to MSphone model, chose the model, then the blue light flashes that pairing success (phone pairing password is: 0000, this Bluetooth device model: MSphone)3. Calls: phone calls, the phone still rings ring
Specifications * Fashion and Smart design, bluetooth 3.0 headphone, with hand-free function. 5 hours playong time. Pure Wireless, Pure Quality Wires limiting your listening pleasure? Not anymore. Connect the MA-826 to compatible Bluetooth mobile devices like laptops, mobile phones or portable media players, and experience wireless audio from up to 10 meters anywhere in your home or outdoors.Superior Sonic Performance and ComfortPrecisely tuned Neodymium drivers deliver superb audio for the purest listening experience. Be prepared for total immersion in yourmusic and movie entertainment. Soft leatherette ear cushions let you listen to your entertainment in extreme comfort, even during long hours of extended wear. Clear Voice CallsA concealed microphone lets you enjoy crystal-clear phone calls without a cumbersome boom getting in your way. Also, the HB-208 has ClearSpeech Engine technology that suppresses noise and enhances speech so you won't need to compete with backgro
Brand Name: Eimuse Model Number: BS-02 Style: In-Ear Communication: Wired Connectors: 3.5mm Use: Portable Media Player Function: Bluetooth Place of Origin: Guangdong China (Mainland) Headphone: in ear type: bluetooth earphone color: for customer needs Packaging & Delivery Packaging Detail: 1pc/polybag / gift box / blister card Delivery Detail: three to four weeks Specifications 1.Direct OEM factory 2.Short sample leadtime 3.LOGO available 4.CE ROHS ISO compliant 5.Fit for MP3 computer CD radio etc 2013 Hotest Fashionable Wireless Stereo Audio Bluetooth Headphone BS-02 Features and Advantages : 1. Vogue slim design, lightweight and comfortable 2. Dual stereo track, Ideal choice for listening music with iPod and MP3 players. . 3. Suitable for iPod all types and iPhone all t
Specifications Bluetooth headphones with OLED display/ FM radio Suitable for ipod/iphone/laptop etc small wireless headphones Fully CE ROHS 2013 fashion bluetooth headphones,OLED display earphones,TFcard stereo handsets with FM radio ------------------------Product Performance ------------------------- 1Folding portable plug-in card bluetooth headphones 2V3.0+EDR Blooth version,High data rate; 3Support 16GB TF card music play; 4Wearing type elegant appearance design, fashionable avant-courier; 5OLED display,the play state be clear at a glance; 6Intelligent lyrics displayed function,will be played on the display lyrics(LFC format for file); 7The Hi-Fi stereo,let you move feeling,three-dimensional transparence service of music;8Wearing the soft plastic material design,comfortable wearing;98 kinds of sound choice,meet different music needs 10Take FM radio function,support campus radio 11The built-in recording function,can record outside of the audio source 12The b
Brand Name: (FLYING)OEM Model Number: 210BT Style: Headband Communication: Wireless Connectors: USB Use: Portable Media Player Function: Bluetooth,Noise Cancelling,bluetooth Place of Origin: Guangdong China (Mainland) COLOR: red,blue,yellow,etc shape: fashionable and popular distance: 10m Packaging & Delivery Packaging Detail: blister packing Delivery Detail: 10-15days Specifications Bluetooth 2.1 wireless Automatic Switch-over between calls and music No wire,no transmitter,no software,no setup to connect. Description: Bluetooth headset &
Brand Name: OEM Model Number: YU-BT8130 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Computer Function: Bluetooth,Waterproof,Noise Cancelling Place of Origin: Guangdong China (Mainland) colors: colors are available:black,white,red(You can do your own color) packaging: color box,customized packaging MOQ and price: ajustable according detailed situation Packaging & Delivery Packaging Detail: gift box,blister packages. Delivery Detail: 28-35days Specifications Adavantage:Providing you fresh enjoying of beautiful sound and talking.Its elegant and comfortable design makes it ideal for you Adavantage:Providing you fresh enjoying of beautiful sound and talking.Its elegant and comfortable design makes it ideal for you Specification: Built-in microphone
Specifications Bluetooth Headset 1.Sterep 4.0 2.IOS9001 Approval factory 3.With nosie reduction 4.Raw ABS meterial 2013 Best Portable Powerful Bluetooth Headset Features 1. In-ear type with comfortable earplug, easy to use.2. Enjoy stereo music wirelessly from Bluetooth CSR devices.3. Embedded microphone for hands-free conversation from Bluetooth-enabled cell4. When receives an incoming call, the music will pause automatically.5. Easy controls for mute, call transfer, voice dial and call answer/end/reject.6. Support remote volume up and volume down.7. Automatically connect to the last connected Bluetooth device.8. Available to connect two console in the same time, and easy to exchange.9. Fashion design10. Extremely tough,durable,fashion and eco-friendly,without any special smell.11. The logo and name brand can be printed according to your requirement.12. Excellent after-sales service,welcome your own design. Packing details Packingblister box or customizedCarton Size
Brand Name: HFL Model Number: HFL-DSC00143 Style: In-Ear Communication: Wired Connectors: other Use: earphone Function: Bluetooth,Silicone earphone plugs Place of Origin: Guangdong China (Mainland) Material: 100% food grade silicone Size: 12x13mm Layer: Double Layers Color: Different Colors Payment terms: T/T, L/C Payment methords: FOB shenzhen MOQ: 10000pcs Certificate: ISO9001, SGS Shipment: as customized Packaging & Delivery Packaging Detail: Inner packing:2pcs packed in polybag,1000pcs packed in polybag outer packing:10 polybags/ctn measurement:335*290*265mm We also can make the packing by clients' request . Delivery Detail: 15-25days Specifications Silicone earplugs for bluetooth headset 1,Material: silicone 2,MOQ:10000pcs 3,Shipment: as customized 4,Color: as customized silicone earplugs for bluetooth headset:1.Made of 100% grade silicone with FDA and SGS approval2.Bowl shape to fit the ear canal comfortably for decreasing noise 3.Non-toxic,smooth, dirt resistant4.More
Brand Name: suoyana or OEM Model Number: SL-450 Style: Headband Communication: Wireless Connectors: USB Use: Portable Media Player Function: Bluetooth,Noise Cancelling,Microphone Place of Origin: Guangdong China (Mainland) Packaging & Delivery Packaging Detail: color box Delivery Detail: 10-15days Specifications bluetooth headphone s450 1.Built in MP3 player 2.Support TF card 3.Factory price 4.CE,FCC bluetooth headphone s450 Product Features:Sound quality with super bass speakerColorful ear shells nakes it beautifulOEM & ODM is welcomeadjustable head band and comfortable wearing Best for mp3/mp4, CD, PC/laptopwith in line microphone and volume control Specs: Bluetooth Version2.1 with EDROperating Distance10mBatteryBattery Built-in rechargeable li-on polymer batteryTransmission powerclass 2Charging PlugA/C chargerMusic StreamingYesMulti-function Button On/OffYesStandard
Specifications Foldable Bluetooth Headphone by Custom Design 1.100kpcs per month 2.500pcs MOQ 3.CE,ROHS,FCC 4,OEM custom design,logo,pack Foldable Bluetooth Headphone by Custom Design : Feature : 1.Vogue slim design, lightweight and comfortable2. Dual stereo track, Ideal choice for listening music with iPod and MP3 players. . 3.Suitable for iPod all types and iPhone all types, MP3/MP4 players etc. Specifications :·Speaker:40mm·Color:any pantone colour·Frequency Range:20H--20KHZ·Sensitivity:103dB+/-3dB at 1000Hz·Impedance:32ohm·Plugging:3.5mm Stereo·Length of cable:2.0m·LOGO:available·CE,ROHS,FCC compliant·Fit for MP3,computer,
Brand Name: MINDSONIC Model Number: BTSHS-203 Style: Headband Communication: Wireless Connectors: USB & 3.5mm Use: Mobile Phone Function: Bluetooth Place of Origin: Zhejiang China (Mainland) color: black & white certificate: CE,ROHS Packaging & Delivery Packaging Detail: color box Delivery Detail: 30days Specifications Bluetooth Headphone Bluetooth 2.1+ EDR With built-in microphone Rechargeable lithium battery Neckband design Bluetooth Headphone Specifications:Working Frequency: 2.4GHzReceiving range: 10m, class 2Modulation: GFSKTransmitter power: 4dbmHeadphone-Frequency Response: 20~20K Hz-S/N ratio: >78dB-Distortion: <0.1%-Working voltage: 3.3~4.2V-Speaker size: 30mm-Speaker impedance: 32 OhmsMicrophone:-Size: 6mmx1.8mm-Impedance: 2.2K Ohms Features:Bluetooth 2.1+ EDRWith built-in microphoneUsing lithium battery, playing time up to 8 hours, standby time around 100 hoursFoldable design for easy carrying.Compatible with all Bluetooth enabled devices such a
Specifications Headphone music player # OEM/ODM # Micro SD card music headphone # FM Radio. Wired headphone # Built-in Li-ion bettery wireless bluetooth headset / stereo bluetooth headphone Detailed Product Description Headphone music player
Brand Name: Shuerr Model Number: SER-HEB-007 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Mobile Phone Function: Bluetooth,Noise Cancelling,Microphone Place of Origin: Guangdong China (Mainland) Color of the ear shell: Can be customized as pantone color Color of the cord: Can be customized as pantone color Raw material of the cord: PVC, TPE Logo impritnts: Can be peritned of the shells OEM service: Is available General Color: White, black, red, purple, blue, etc Bluetooth options: Universal Bluetooth card 2.4G Capacity of Batteries: 280 mA Certificate: CE,Rohs,FCC Packaging & Delivery Packaging Detail: PE Bag, Gift Paper Box, Plastic Case, PU Socket, Colorful Box, Acrylic Case, etc Delivery Detail: about 25 days against you confirm the approval samples Specifications 1.2.4G Bluetooth Card with best sound quality 2.Color of headset can be customized as Pantone color 3.CE, Rohs,FCC certificate Services / FAQs & Order Procedures Who ?We are&nbs